TY - JOUR

T1 - Asymmetric Membranes Based on Copolyheteroarylenes with Imide, Biquinoline, and Oxazinone Units: Formation and Characterization

AU - Polotskaya, Galina

AU - Pulyalina, Alexandra

AU - Goikhman, Mikhail

AU - Podeshvo, Irina

AU - Gofman, Iosif

AU - Shugurov, Sergey

AU - Rostovtseva, Valeriia

AU - Faykov, Ilya

AU - Tataurov, Maksim

AU - Toikka, Alexander

AU - Polotsky, Alexander

N1 - Publisher Copyright: © 2019 by the authors.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Modern ultrafiltration requires novel perfect membranes with narrow pore size, high porosity, and minimal pore tortuosity to achieve high separation performance. In this work, copolyamic acid (co-PAA) was synthesized and used for the preparation of asymmetric porous membranes by phase inversion technique. Several co-PAA membranes were heated up to 250 ◦C; during heating, they undergo solid-phase transformation into copolybenzoxazinoneimide (co-PBOI) via dehydration and cyclization. Comparative characterization of both co-PAA and co-PBOI membranes was realized by scanning electron microscopy, mechanical testing, thermogravimetric analysis, and ultrafiltration experiments. Membrane calibration was carried out using a mixture of seven proteins with different molecular weights. During heat treatment, the molecular weight cut-off of the membranes decreased from 20 × 103 g/mol (co-PAA) to 3 × 103 g/mol (co-PBOI). Abnormally low dispersions of rejection (0.3 for co-PAA and 0.45 for co-PBOI) were observed for the studied membranes; this fact indicates that the membranes possess enhanced resolving power.

AB - Modern ultrafiltration requires novel perfect membranes with narrow pore size, high porosity, and minimal pore tortuosity to achieve high separation performance. In this work, copolyamic acid (co-PAA) was synthesized and used for the preparation of asymmetric porous membranes by phase inversion technique. Several co-PAA membranes were heated up to 250 ◦C; during heating, they undergo solid-phase transformation into copolybenzoxazinoneimide (co-PBOI) via dehydration and cyclization. Comparative characterization of both co-PAA and co-PBOI membranes was realized by scanning electron microscopy, mechanical testing, thermogravimetric analysis, and ultrafiltration experiments. Membrane calibration was carried out using a mixture of seven proteins with different molecular weights. During heat treatment, the molecular weight cut-off of the membranes decreased from 20 × 103 g/mol (co-PAA) to 3 × 103 g/mol (co-PBOI). Abnormally low dispersions of rejection (0.3 for co-PAA and 0.45 for co-PBOI) were observed for the studied membranes; this fact indicates that the membranes possess enhanced resolving power.

KW - copolyheteroarylene

KW - membrane

KW - Ultrafiltration

KW - protein calibration

KW - rejection

KW - Rejection

KW - Copolyheteroarylene

KW - Membrane

KW - Protein calibration

UR - https://www.researchgate.net/publication/335978900_Asymmetric_Membranes_Based_on_Copolyheteroarylenes_with_Imide_Biquinoline_and_Oxazinone_Units_Formation_and_Characterization

UR - http://www.scopus.com/inward/record.url?scp=85073352126&partnerID=8YFLogxK

U2 - 10.3390/polym11101542

DO - 10.3390/polym11101542

M3 - Article

VL - 11

JO - Polymers

JF - Polymers

SN - 2073-4360

IS - 10

M1 - 1542

ER -